Weighing-machine



` APPLICATION mLD nc.2o, :920. 1,399,433. Y

K. JUKES.

WEIGHING MAcHlNE.

` Patented Dec. 6, 1921.

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WEIGHING MACHINE.

APPLICATION FILED DEC-20, 1920.

Patented Dec. 6, 1921.

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UNITED STATES KARL JUKES, 0F WUTHENOV, NEAR NEURUPPIN, GERMANY.

WEIGHING-MACHINE.

Specification of Letters Patent.

Patented Dec. 6, 1921.

Application led December 20, 1920. Serial No. 432,126.

To @ZZ whom t may concern.'

Be it known that I, KARL JUKns, engineer, citizen of the PrussianRepublic, residing at Wuthenow, near Neuruppin, country houselllaldfriedem Germany, have invented certain new and useful improvementsin or Relating to lVeighing-ll/lachines, (for which I have filed anapplication in Germany, Feb. 27, 1918,) of which the following is aspecilication.

rllhe present invention relates to weighing machines; and it resides,briefly, in the provision of improved devices by means of which theweights are shifted into and out of action, the object being to renderthe power which is utilized for moving the weights independent of theweights themselves.

According to the invention, spring-supported levers for moving theweights are provided, which levers are balanced with relation to therespective weights, so that in depressing any one of said levers, onlythat force has to be overcome which serves for holding the lever in itshighest position. This improved suspension mounting has the advantagethat the amount of power necessary for moving the heaviest weights isonly slightly different from that required for moving the smallestweights. The operation of the weighing mechanism is, therefore,independent of the load of the weights and practically uniform.

For locking the weighing levers in their lowermost position, automaticpawls already known in other weighing machines are employed, andlikewise a lever for unlocking or releasing the pawls for the purpose ofreturning said levers to their position of rest. According to thisinvention, the said pawls are associated with the returning crank orlever in such a manner that the power of the springs is exerted on thereturning crank during the upward or return movement ofthe weighinglevers, with the result that the said crank itself is brought back toits initial position after having been depressed. This arrangement hasthe advantage that in operating the return crank a uniform bralo ingaction may be exerted on the levers to be returned. i

For the purpose of lowering several weights at the same time upon thescale platform by a single operation, the corresponding levers areconnected with a special lever in such a manner that they may be presseddown simultaneously when said lever is operated. question are those forweighing amounts corresponding to one-quarter or one-half a pound, thecombined weights carried by the levers controlled by the special leverstotaling such amounts. A considerable saving of time may be obtained bythis arrangement.

A further improvement involved in the invention relates to an indicatingscale, the p number or diget disks of which are controlled by theweighing levers in the usual manner. According to the invention, tendisks arranged one behind another are provided for each unit, thesedisks being controlled by levers of the corresponding denominationalunits of weights by means of lifter levers in suoli a manner that theshoulders provided on said levers act to lift a certain number of disksinto the path of the sight-window, such number corresponding to theweights put down. During this operation an addition of the severalweights put down on the scale platform takes place, so that theindicating mechanism always shows the total, which could not be done informer apparatus of this kind. For the purpose of neutralizing orCounterbalancing the weight of vessels or the like before the weighingoperation proper can be effected, a special lever is employed which, bymeans of a crank, acts to automatically throw out all of the lifterlevers. By this arrangement it is possible to render visible for thepurpose of control only the proper `weight ofthe goods.

A further improvement comprised in the invention consists in arrangingthe special levers between the highest weights, whereas the remainingweights are inter-fitted, certain of them projecting in front of andbehind the contiguous weights, so tha the weights may be arranged on asmall portion of the scale platform.

An embodiment of the invention is illustrated in the accompanyingdrawing, in which Figure 1 is a vertical view of the system of weighinglevers and associated parts involved in the machine.

Fig. 2 is a perspective view of the levers utilized in weighingcombinations involving a quarter of pound.

Fig. 3 is a similar view of the arrangement for combinations involvinghalf a pound.

Fig. 4 is a front elevation of the complete machine. .y l

Special levers of the character in amounts' areV representedv in theannexedV drawing with indications` in grams; V"As shown in Fig. 1,'eachweightis providedVv with 'a bail a, suspended fromV a?bifurcatedV memberor Vfork b. The bail o is of such dimensions that after depositing theweight (for instance 1000V grams in Fig.y l) upon Vthe lscale platformB, the weighing lever 'may be lowered to such extent that said platformmay moveV freely with'y respectto the fork .5. The latter is suspended`from a weighinglever o fulcrumed at d and supporting aV finger-piece atits extreme end.

VT he Vweighing lever c is suspended by'means of a spring e, the tensionof which is so adjusted with respect to the corresponding Yeo weightthat the weight is normally kept in its uppermost position withoutvibration. The weighing levers in juxtaposition are journaled on acommon shaft (l (Fig. 5) and their associated springs e are connectedVto a common angle-'rail f.

ln order to insurethatthe weightsalways occupy the same positionsrelative tothe platform B, said weights may be provided with depending,conical lugs g which aline with openings in the platform, as shown inV Fig. l,.so that the weights will thus be centered with relation to theplatform when lowered. This centering action is facili'- tated byproviding the cones g with depending stems 7L which are sufficiently.long to pass through the platform openings in any position of the weightand are of reduced diameter so as to extend through said open# ingswithout touching the Vwalls thereof; said stems also serving to preventdisplacement vof the weights while the platform is in motiomas well aswhen the machine itself isbeing transported Vfrom one place to another.For each weighing-lever a pawl 7a is provided located abovethe same andmounted? for pivotal movement on a universal han or shaft i; said pawlbeing subjected to the action of a contractile spring Z which causes itto automatically engage a cam o as soon as the corresponding weighinglever has reached its lowermorst position. rEhe releasing of the lockthus produced-z'. e., the disengagement of the pawlfrom said cam-V iseffected by raising bar z' by means .of the angular retuin'crank C.thelatter being fulcrumed at its apex at m and. connected at its lowerend to the said bar to support the saine. lf the crank AC is pressedVVdownwardly, its lower end is caused to swing upwardly inl acounter-clockwise direction, carrying `with. it bar z' and pawls 7c, thelatter being thereby released from any of the cams o with which theyniayvbe engaged. Any weighing lever c which is depressed at that -|The frameVn, 0, n is also tion proper takes-place a vessel 'lever is' transmittedby theV latter tothe Vpawl c andrbar a', and, hence, tolcrank C which isthus restored to its initial position.

In Figs.V 2 and Vvare represented the special levers and Atheir one-wayconnections, together with the systemof weighing levers,V In FigQ, arocking frame n, o, n is connect.- edl by a rod p with the special levercl.

f i connected by the pushV rods p100, p20 and p5 to the 'levers forrespectivelyweighing 100 grams, 2O grams and' grams.V If the speciallever correspoiiding to 9g Y weights mentioned are simultaneously .setdown upon the scale platform B. The returnY of the weightsto theirineffective position is brought about by means of the .turncrank C. Ifin similar way the Vweights for poundV are to be set down upon theplatform, the special lever c rli (represented in Fig. 3) Y is.depressed, thereby 'rocking the frame g, r, g and moving downward withit by means of the push rods S50V and s200 the levers 050 and 0200.

The indicating mechanism .consists of ten Vnumbered another with the Ooutermost and guided in a frame inthe digits or numbers oii said disksbeing visible-'through the sightv winy dow u in the front wall of thecasing. Each weighing lever c has a pin-andslot connection with the endof one armof an angle lever o, the other arm of which has pivotallyconnected to it the lower endof a lifter lever Y :a Vwhich iscoiinectedbya spring o with the first-named arm. The upper ends of the lifterlevers are provided with shoiildersVV x for engagement withthefloweredges of' the indicatingV disks t, and these shoulders are ofdilferent'widths for the different weighing levers, so that when anyweighing lever is depressed, its associated lifter lever will lift sucha number jof disks' as to expose through the sightl window only theproper digit of the number corre.-

sponding to the particular weighty low-V ered upon the scale platform.In the construction represented'in Fig'. 1,'the 1000- gram lever isshownin dotted lines in itsl depressed position;l and in such instancethe corresponding lifter lever will move one disk only (the Zero disk),with the result that the digit l willsh'ow through the sight window.When the weighing levers are thereafter raisedto their normal positions,the lifter levers and the respective indicating disks t areloweredagain'.

Inthe event YVthat before tie w anced on the receiving platform by meanspound is depressed, thev disks .t arranged fone behind of correspondingweights, it is necessary to neutralize this weight before the properweight for the regular weighing operation is adjusted. For this purposea Zero-control lever (see Fig. 5) is provided, which lies behind thespecial el; pound lever and acte upon a rocking bail el by means of anangl lever e in such a manner that all of the lifte levers rc areshifted out of line with the disks. This Zero-control lever is notlocked in its lowermost position, but. is moved back to its ineffectiveposition immediately after it has effected a lowering of the indicatingdisks t.

The zero-control lever and the special pound and pound levers aredisposed between the weights of highest value, as represented in Fig. 5;whereas the weight carried by the remaining weighing levers areinterfitted, and certain of them projectat opposite ends beyond the endsof contiguous weights, such construction enablingthe weights to bearranged on a small portion of the scale platform.

In order to avoid disturbing said disks during their normal returnmovement w ien they are being lowered by the shoulders fel, the baillever .el is provided with an extension e2 which projects into the pathof the pawl-barcl and is turned by the lat-ter during` the last part ofthe stroke of the crank C. All of the lifter levers m and likewise alllof the indicating disks t are thereby brought back into their initialposition of rest.

For the convenience of the shopper the play of the balance hands A1 andB1 may be transmitted to the level of the sight window u, so that it maybe readily observed, the transmitting devices consisting, for instance,of a system of levers represented in dotted lines in Fig. d. One hand A2may be fixed in such case and only the hand B2 caused to move during theplay of the scale platform B.

A second sight window u may be provided to expose the movements of theindicating disks to the clerk, so that like digits are provided on therear sides of the disks. The rear digits on the disks will be arrangedin reverse order which, nevertheless, will not cause any inconveniencein reading.

A further advantage of the present weighing machine resides in the factthat the scale platform may be secured without any difhculty, becausethe mechanism for lowering` and lifting the weights is quite independentof the balance proper, which latter may therefore be adjusted in thesame manner as the individual weights.

I claim as my invention 1. In a weighing machine, the combination, witha scale platform and a set of weights adapted to rest upon it in theirlowered position, of weight-shifting mechanism comprising a set ofweighing levers, from each `of which a weight is suspended; and a setofsupporting springs, one individual to each lever, for holding saidlevers and weights normally in elevated position, the tension 0f thesprings being so adjusted to normally balance the levers and associatedweights.

2. In a 'weighing machine, the combination, with scale platform and aset of weights adapted to rest upon it in their lowered position, ofweight-shifting mechanism comprising a set of weighing levers, from eachof which a weight is suspended; a set of supporting springs, oneindividual to each lever, for holding said levers and weights normallyin elevated position; a locking pawl individual to each lever forholding the same in depressed position; and a return crank for releasingsaid pawls to permit tie depressed levers to be returned by theirrespective springs; said pawls being hingec ly related to said crank,whereby the upward pull exerted upon a depressed lever by its spring istransmitted from the lever to its associated pawl and thence to thecrank to return the same to its initial position after hai/'ing beenactuated.

In a weighing machine, the combination,l with a scale platform and a setof weights adapted to rest upon it in their lowered position, ofweight-shifting mechanism comprising` a set of weighing levers, fromeach of which a weight is suspended; a set of supporting springs, oneindividual to each lever, for holding said levers and weights normallyin elevated position; a locking pawl individual to each lever forholding` the same in depressed position; a common supporting bar whereonall of the pawls are mounted; and a two-armed crank for releasing saidpawls to permit the depressed levers to be returned by their respectivesprings; said crank being fulcruined at the intersection of its two armsand having` its lower arm connected to support said pawl bar, wherebythe upward pull exerted upon a depressed lever by its spring istransmitted to its associated pawl and thence through said pawl bar tothe crank to return the same to its initial position after having beenactuated.

l. In a weighing machine, the combination, with a scale platform, and aplurality of weights adapted to rest upon it in their lowered position,of a plurality of weighing levers, one for each weight, for lowering thesame upon the platform; a special lever; and a set of connectionsbetween the special lever and all of the weighing levers for operatingthe latter simultaneously when said special lever is depressed, saidconnections enabling any individual weighing lever to be directlyoperated independently of the other weighing levers.

5. In weighing machine, kthe Combination, with a scale platform, andaplurality ing frame connected to said lever to be operated thereby; aplurality of weighing Y levers, one for each weight, for lowering thesame upon the platform; and connections between said frame and saidweighing levers for operating all of the latter when the frame isrocked'by the special lever, but enabling any individual weighing leverto be directly operated independently of the other weighing levers.

6l In a Weighing machine,V the combina` tion,'with'a scale platform, anda plurality of weights adapted to rest upon it in their loweredposition, of a plurality of weighing levers, one for each weight, tolowerk the same upon the platform; a set of digit-bearing indicatingdisks for each denominational unit, Vthe disks of each set beingarranged one behind another; and a set of shifting leversassociated'with each "set of disks and' adapted to shift differentdefinite numbers of disks so as t0 expose different digits, saidshifting levers being connected to the vdifferent weighing levers foroperation thereby. Y 7. A weighing machine, according to claim 6, inwhich the shifting levers are Vdisposed beneath the disks Vfor upwardmovement, said levers havingI shoulders of different widths at theirupper ends to engage different numbers of disks.

V8. In a'weighing machine, the `combination, with a scaleplatform, and aplurality of weights adapted to rest upon itin their loweredposition,.ofa plurality of *.veighing ciated with each set-ofV disks andadapted'to shift different definite numbers of disks so as to exposedifferent digits, said shifting levers being connected to the differentweighing levers for operation thereby; a special lever; and a connectionbetween the special lever and the shiftingv leversrfor simultaneouslythrowing vout all of the-` shifting levers when said special lever isoperated;

9. A weighing machine, according to claimy 8, in which the connectionbetween the special lever and the shifting levers comprises a bailadapted to engage all of said shifting levers at the same time, and arocker operated by the special lever andl adapted to engage and actuatesaid bail.

l0. In aweighing machine,the combination, with ascale platform, of aplurality of weighing levers corresponding to dierent Y definiteamounts; a weight suspended from each lever; and adapted to be loweredthereby upon the platform and a plurality of special levers forweighing'combinationsof such amounts disposed between theweights ofhighest value; the weights carried by the ,remainingweighing leversbeing interitted and certain of them projecting at, opposite ends beyondthe ends of contiguous weights. Y In testimony whereof I' aHiX mysignature.

Y' KARL Joints.

